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rtlwifi: Change order in device startup
[deliverable/linux.git] / drivers / platform / x86 / samsung-laptop.c
1 /*
2 * Samsung Laptop driver
3 *
4 * Copyright (C) 2009,2011 Greg Kroah-Hartman (gregkh@suse.de)
5 * Copyright (C) 2009,2011 Novell Inc.
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
10 *
11 */
12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13
14 #include <linux/kernel.h>
15 #include <linux/init.h>
16 #include <linux/module.h>
17 #include <linux/delay.h>
18 #include <linux/pci.h>
19 #include <linux/backlight.h>
20 #include <linux/leds.h>
21 #include <linux/fb.h>
22 #include <linux/dmi.h>
23 #include <linux/platform_device.h>
24 #include <linux/rfkill.h>
25 #include <linux/acpi.h>
26 #include <linux/seq_file.h>
27 #include <linux/debugfs.h>
28 #include <linux/ctype.h>
29 #include <linux/efi.h>
30 #include <linux/suspend.h>
31 #include <acpi/video.h>
32
33 /*
34 * This driver is needed because a number of Samsung laptops do not hook
35 * their control settings through ACPI. So we have to poke around in the
36 * BIOS to do things like brightness values, and "special" key controls.
37 */
38
39 /*
40 * We have 0 - 8 as valid brightness levels. The specs say that level 0 should
41 * be reserved by the BIOS (which really doesn't make much sense), we tell
42 * userspace that the value is 0 - 7 and then just tell the hardware 1 - 8
43 */
44 #define MAX_BRIGHT 0x07
45
46
47 #define SABI_IFACE_MAIN 0x00
48 #define SABI_IFACE_SUB 0x02
49 #define SABI_IFACE_COMPLETE 0x04
50 #define SABI_IFACE_DATA 0x05
51
52 #define WL_STATUS_WLAN 0x0
53 #define WL_STATUS_BT 0x2
54
55 /* Structure get/set data using sabi */
56 struct sabi_data {
57 union {
58 struct {
59 u32 d0;
60 u32 d1;
61 u16 d2;
62 u8 d3;
63 };
64 u8 data[11];
65 };
66 };
67
68 struct sabi_header_offsets {
69 u8 port;
70 u8 re_mem;
71 u8 iface_func;
72 u8 en_mem;
73 u8 data_offset;
74 u8 data_segment;
75 };
76
77 struct sabi_commands {
78 /*
79 * Brightness is 0 - 8, as described above.
80 * Value 0 is for the BIOS to use
81 */
82 u16 get_brightness;
83 u16 set_brightness;
84
85 /*
86 * first byte:
87 * 0x00 - wireless is off
88 * 0x01 - wireless is on
89 * second byte:
90 * 0x02 - 3G is off
91 * 0x03 - 3G is on
92 * TODO, verify 3G is correct, that doesn't seem right...
93 */
94 u16 get_wireless_button;
95 u16 set_wireless_button;
96
97 /* 0 is off, 1 is on */
98 u16 get_backlight;
99 u16 set_backlight;
100
101 /*
102 * 0x80 or 0x00 - no action
103 * 0x81 - recovery key pressed
104 */
105 u16 get_recovery_mode;
106 u16 set_recovery_mode;
107
108 /*
109 * on seclinux: 0 is low, 1 is high,
110 * on swsmi: 0 is normal, 1 is silent, 2 is turbo
111 */
112 u16 get_performance_level;
113 u16 set_performance_level;
114
115 /* 0x80 is off, 0x81 is on */
116 u16 get_battery_life_extender;
117 u16 set_battery_life_extender;
118
119 /* 0x80 is off, 0x81 is on */
120 u16 get_usb_charge;
121 u16 set_usb_charge;
122
123 /* the first byte is for bluetooth and the third one is for wlan */
124 u16 get_wireless_status;
125 u16 set_wireless_status;
126
127 /* 0x81 to read, (0x82 | level << 8) to set, 0xaabb to enable */
128 u16 kbd_backlight;
129
130 /*
131 * Tell the BIOS that Linux is running on this machine.
132 * 81 is on, 80 is off
133 */
134 u16 set_linux;
135 };
136
137 struct sabi_performance_level {
138 const char *name;
139 u16 value;
140 };
141
142 struct sabi_config {
143 int sabi_version;
144 const char *test_string;
145 u16 main_function;
146 const struct sabi_header_offsets header_offsets;
147 const struct sabi_commands commands;
148 const struct sabi_performance_level performance_levels[4];
149 u8 min_brightness;
150 u8 max_brightness;
151 };
152
153 static const struct sabi_config sabi_configs[] = {
154 {
155 /* I don't know if it is really 2, but it it is
156 * less than 3 anyway */
157 .sabi_version = 2,
158
159 .test_string = "SECLINUX",
160
161 .main_function = 0x4c49,
162
163 .header_offsets = {
164 .port = 0x00,
165 .re_mem = 0x02,
166 .iface_func = 0x03,
167 .en_mem = 0x04,
168 .data_offset = 0x05,
169 .data_segment = 0x07,
170 },
171
172 .commands = {
173 .get_brightness = 0x00,
174 .set_brightness = 0x01,
175
176 .get_wireless_button = 0x02,
177 .set_wireless_button = 0x03,
178
179 .get_backlight = 0x04,
180 .set_backlight = 0x05,
181
182 .get_recovery_mode = 0x06,
183 .set_recovery_mode = 0x07,
184
185 .get_performance_level = 0x08,
186 .set_performance_level = 0x09,
187
188 .get_battery_life_extender = 0xFFFF,
189 .set_battery_life_extender = 0xFFFF,
190
191 .get_usb_charge = 0xFFFF,
192 .set_usb_charge = 0xFFFF,
193
194 .get_wireless_status = 0xFFFF,
195 .set_wireless_status = 0xFFFF,
196
197 .kbd_backlight = 0xFFFF,
198
199 .set_linux = 0x0a,
200 },
201
202 .performance_levels = {
203 {
204 .name = "silent",
205 .value = 0,
206 },
207 {
208 .name = "normal",
209 .value = 1,
210 },
211 { },
212 },
213 .min_brightness = 1,
214 .max_brightness = 8,
215 },
216 {
217 .sabi_version = 3,
218
219 .test_string = "SwSmi@",
220
221 .main_function = 0x5843,
222
223 .header_offsets = {
224 .port = 0x00,
225 .re_mem = 0x04,
226 .iface_func = 0x02,
227 .en_mem = 0x03,
228 .data_offset = 0x05,
229 .data_segment = 0x07,
230 },
231
232 .commands = {
233 .get_brightness = 0x10,
234 .set_brightness = 0x11,
235
236 .get_wireless_button = 0x12,
237 .set_wireless_button = 0x13,
238
239 .get_backlight = 0x2d,
240 .set_backlight = 0x2e,
241
242 .get_recovery_mode = 0xff,
243 .set_recovery_mode = 0xff,
244
245 .get_performance_level = 0x31,
246 .set_performance_level = 0x32,
247
248 .get_battery_life_extender = 0x65,
249 .set_battery_life_extender = 0x66,
250
251 .get_usb_charge = 0x67,
252 .set_usb_charge = 0x68,
253
254 .get_wireless_status = 0x69,
255 .set_wireless_status = 0x6a,
256
257 .kbd_backlight = 0x78,
258
259 .set_linux = 0xff,
260 },
261
262 .performance_levels = {
263 {
264 .name = "normal",
265 .value = 0,
266 },
267 {
268 .name = "silent",
269 .value = 1,
270 },
271 {
272 .name = "overclock",
273 .value = 2,
274 },
275 { },
276 },
277 .min_brightness = 0,
278 .max_brightness = 8,
279 },
280 { },
281 };
282
283 /*
284 * samsung-laptop/ - debugfs root directory
285 * f0000_segment - dump f0000 segment
286 * command - current command
287 * data - current data
288 * d0, d1, d2, d3 - data fields
289 * call - call SABI using command and data
290 *
291 * This allow to call arbitrary sabi commands wihout
292 * modifying the driver at all.
293 * For example, setting the keyboard backlight brightness to 5
294 *
295 * echo 0x78 > command
296 * echo 0x0582 > d0
297 * echo 0 > d1
298 * echo 0 > d2
299 * echo 0 > d3
300 * cat call
301 */
302
303 struct samsung_laptop_debug {
304 struct dentry *root;
305 struct sabi_data data;
306 u16 command;
307
308 struct debugfs_blob_wrapper f0000_wrapper;
309 struct debugfs_blob_wrapper data_wrapper;
310 struct debugfs_blob_wrapper sdiag_wrapper;
311 };
312
313 struct samsung_laptop;
314
315 struct samsung_rfkill {
316 struct samsung_laptop *samsung;
317 struct rfkill *rfkill;
318 enum rfkill_type type;
319 };
320
321 struct samsung_laptop {
322 const struct sabi_config *config;
323
324 void __iomem *sabi;
325 void __iomem *sabi_iface;
326 void __iomem *f0000_segment;
327
328 struct mutex sabi_mutex;
329
330 struct platform_device *platform_device;
331 struct backlight_device *backlight_device;
332
333 struct samsung_rfkill wlan;
334 struct samsung_rfkill bluetooth;
335
336 struct led_classdev kbd_led;
337 int kbd_led_wk;
338 struct workqueue_struct *led_workqueue;
339 struct work_struct kbd_led_work;
340
341 struct samsung_laptop_debug debug;
342 struct samsung_quirks *quirks;
343
344 struct notifier_block pm_nb;
345
346 bool handle_backlight;
347 bool has_stepping_quirk;
348
349 char sdiag[64];
350 };
351
352 struct samsung_quirks {
353 bool broken_acpi_video;
354 bool four_kbd_backlight_levels;
355 bool enable_kbd_backlight;
356 };
357
358 static struct samsung_quirks samsung_unknown = {};
359
360 static struct samsung_quirks samsung_broken_acpi_video = {
361 .broken_acpi_video = true,
362 };
363
364 static struct samsung_quirks samsung_np740u3e = {
365 .four_kbd_backlight_levels = true,
366 .enable_kbd_backlight = true,
367 };
368
369 static bool force;
370 module_param(force, bool, 0);
371 MODULE_PARM_DESC(force,
372 "Disable the DMI check and forces the driver to be loaded");
373
374 static bool debug;
375 module_param(debug, bool, S_IRUGO | S_IWUSR);
376 MODULE_PARM_DESC(debug, "Debug enabled or not");
377
378 static int sabi_command(struct samsung_laptop *samsung, u16 command,
379 struct sabi_data *in,
380 struct sabi_data *out)
381 {
382 const struct sabi_config *config = samsung->config;
383 int ret = 0;
384 u16 port = readw(samsung->sabi + config->header_offsets.port);
385 u8 complete, iface_data;
386
387 mutex_lock(&samsung->sabi_mutex);
388
389 if (debug) {
390 if (in)
391 pr_info("SABI command:0x%04x "
392 "data:{0x%08x, 0x%08x, 0x%04x, 0x%02x}",
393 command, in->d0, in->d1, in->d2, in->d3);
394 else
395 pr_info("SABI command:0x%04x", command);
396 }
397
398 /* enable memory to be able to write to it */
399 outb(readb(samsung->sabi + config->header_offsets.en_mem), port);
400
401 /* write out the command */
402 writew(config->main_function, samsung->sabi_iface + SABI_IFACE_MAIN);
403 writew(command, samsung->sabi_iface + SABI_IFACE_SUB);
404 writeb(0, samsung->sabi_iface + SABI_IFACE_COMPLETE);
405 if (in) {
406 writel(in->d0, samsung->sabi_iface + SABI_IFACE_DATA);
407 writel(in->d1, samsung->sabi_iface + SABI_IFACE_DATA + 4);
408 writew(in->d2, samsung->sabi_iface + SABI_IFACE_DATA + 8);
409 writeb(in->d3, samsung->sabi_iface + SABI_IFACE_DATA + 10);
410 }
411 outb(readb(samsung->sabi + config->header_offsets.iface_func), port);
412
413 /* write protect memory to make it safe */
414 outb(readb(samsung->sabi + config->header_offsets.re_mem), port);
415
416 /* see if the command actually succeeded */
417 complete = readb(samsung->sabi_iface + SABI_IFACE_COMPLETE);
418 iface_data = readb(samsung->sabi_iface + SABI_IFACE_DATA);
419
420 /* iface_data = 0xFF happens when a command is not known
421 * so we only add a warning in debug mode since we will
422 * probably issue some unknown command at startup to find
423 * out which features are supported */
424 if (complete != 0xaa || (iface_data == 0xff && debug))
425 pr_warn("SABI command 0x%04x failed with"
426 " completion flag 0x%02x and interface data 0x%02x",
427 command, complete, iface_data);
428
429 if (complete != 0xaa || iface_data == 0xff) {
430 ret = -EINVAL;
431 goto exit;
432 }
433
434 if (out) {
435 out->d0 = readl(samsung->sabi_iface + SABI_IFACE_DATA);
436 out->d1 = readl(samsung->sabi_iface + SABI_IFACE_DATA + 4);
437 out->d2 = readw(samsung->sabi_iface + SABI_IFACE_DATA + 2);
438 out->d3 = readb(samsung->sabi_iface + SABI_IFACE_DATA + 1);
439 }
440
441 if (debug && out) {
442 pr_info("SABI return data:{0x%08x, 0x%08x, 0x%04x, 0x%02x}",
443 out->d0, out->d1, out->d2, out->d3);
444 }
445
446 exit:
447 mutex_unlock(&samsung->sabi_mutex);
448 return ret;
449 }
450
451 /* simple wrappers usable with most commands */
452 static int sabi_set_commandb(struct samsung_laptop *samsung,
453 u16 command, u8 data)
454 {
455 struct sabi_data in = { { { .d0 = 0, .d1 = 0, .d2 = 0, .d3 = 0 } } };
456
457 in.data[0] = data;
458 return sabi_command(samsung, command, &in, NULL);
459 }
460
461 static int read_brightness(struct samsung_laptop *samsung)
462 {
463 const struct sabi_config *config = samsung->config;
464 const struct sabi_commands *commands = &samsung->config->commands;
465 struct sabi_data sretval;
466 int user_brightness = 0;
467 int retval;
468
469 retval = sabi_command(samsung, commands->get_brightness,
470 NULL, &sretval);
471 if (retval)
472 return retval;
473
474 user_brightness = sretval.data[0];
475 if (user_brightness > config->min_brightness)
476 user_brightness -= config->min_brightness;
477 else
478 user_brightness = 0;
479
480 return user_brightness;
481 }
482
483 static void set_brightness(struct samsung_laptop *samsung, u8 user_brightness)
484 {
485 const struct sabi_config *config = samsung->config;
486 const struct sabi_commands *commands = &samsung->config->commands;
487 u8 user_level = user_brightness + config->min_brightness;
488
489 if (samsung->has_stepping_quirk && user_level != 0) {
490 /*
491 * short circuit if the specified level is what's already set
492 * to prevent the screen from flickering needlessly
493 */
494 if (user_brightness == read_brightness(samsung))
495 return;
496
497 sabi_set_commandb(samsung, commands->set_brightness, 0);
498 }
499
500 sabi_set_commandb(samsung, commands->set_brightness, user_level);
501 }
502
503 static int get_brightness(struct backlight_device *bd)
504 {
505 struct samsung_laptop *samsung = bl_get_data(bd);
506
507 return read_brightness(samsung);
508 }
509
510 static void check_for_stepping_quirk(struct samsung_laptop *samsung)
511 {
512 int initial_level;
513 int check_level;
514 int orig_level = read_brightness(samsung);
515
516 /*
517 * Some laptops exhibit the strange behaviour of stepping toward
518 * (rather than setting) the brightness except when changing to/from
519 * brightness level 0. This behaviour is checked for here and worked
520 * around in set_brightness.
521 */
522
523 if (orig_level == 0)
524 set_brightness(samsung, 1);
525
526 initial_level = read_brightness(samsung);
527
528 if (initial_level <= 2)
529 check_level = initial_level + 2;
530 else
531 check_level = initial_level - 2;
532
533 samsung->has_stepping_quirk = false;
534 set_brightness(samsung, check_level);
535
536 if (read_brightness(samsung) != check_level) {
537 samsung->has_stepping_quirk = true;
538 pr_info("enabled workaround for brightness stepping quirk\n");
539 }
540
541 set_brightness(samsung, orig_level);
542 }
543
544 static int update_status(struct backlight_device *bd)
545 {
546 struct samsung_laptop *samsung = bl_get_data(bd);
547 const struct sabi_commands *commands = &samsung->config->commands;
548
549 set_brightness(samsung, bd->props.brightness);
550
551 if (bd->props.power == FB_BLANK_UNBLANK)
552 sabi_set_commandb(samsung, commands->set_backlight, 1);
553 else
554 sabi_set_commandb(samsung, commands->set_backlight, 0);
555
556 return 0;
557 }
558
559 static const struct backlight_ops backlight_ops = {
560 .get_brightness = get_brightness,
561 .update_status = update_status,
562 };
563
564 static int seclinux_rfkill_set(void *data, bool blocked)
565 {
566 struct samsung_rfkill *srfkill = data;
567 struct samsung_laptop *samsung = srfkill->samsung;
568 const struct sabi_commands *commands = &samsung->config->commands;
569
570 return sabi_set_commandb(samsung, commands->set_wireless_button,
571 !blocked);
572 }
573
574 static struct rfkill_ops seclinux_rfkill_ops = {
575 .set_block = seclinux_rfkill_set,
576 };
577
578 static int swsmi_wireless_status(struct samsung_laptop *samsung,
579 struct sabi_data *data)
580 {
581 const struct sabi_commands *commands = &samsung->config->commands;
582
583 return sabi_command(samsung, commands->get_wireless_status,
584 NULL, data);
585 }
586
587 static int swsmi_rfkill_set(void *priv, bool blocked)
588 {
589 struct samsung_rfkill *srfkill = priv;
590 struct samsung_laptop *samsung = srfkill->samsung;
591 const struct sabi_commands *commands = &samsung->config->commands;
592 struct sabi_data data;
593 int ret, i;
594
595 ret = swsmi_wireless_status(samsung, &data);
596 if (ret)
597 return ret;
598
599 /* Don't set the state for non-present devices */
600 for (i = 0; i < 4; i++)
601 if (data.data[i] == 0x02)
602 data.data[1] = 0;
603
604 if (srfkill->type == RFKILL_TYPE_WLAN)
605 data.data[WL_STATUS_WLAN] = !blocked;
606 else if (srfkill->type == RFKILL_TYPE_BLUETOOTH)
607 data.data[WL_STATUS_BT] = !blocked;
608
609 return sabi_command(samsung, commands->set_wireless_status,
610 &data, &data);
611 }
612
613 static void swsmi_rfkill_query(struct rfkill *rfkill, void *priv)
614 {
615 struct samsung_rfkill *srfkill = priv;
616 struct samsung_laptop *samsung = srfkill->samsung;
617 struct sabi_data data;
618 int ret;
619
620 ret = swsmi_wireless_status(samsung, &data);
621 if (ret)
622 return ;
623
624 if (srfkill->type == RFKILL_TYPE_WLAN)
625 ret = data.data[WL_STATUS_WLAN];
626 else if (srfkill->type == RFKILL_TYPE_BLUETOOTH)
627 ret = data.data[WL_STATUS_BT];
628 else
629 return ;
630
631 rfkill_set_sw_state(rfkill, !ret);
632 }
633
634 static struct rfkill_ops swsmi_rfkill_ops = {
635 .set_block = swsmi_rfkill_set,
636 .query = swsmi_rfkill_query,
637 };
638
639 static ssize_t get_performance_level(struct device *dev,
640 struct device_attribute *attr, char *buf)
641 {
642 struct samsung_laptop *samsung = dev_get_drvdata(dev);
643 const struct sabi_config *config = samsung->config;
644 const struct sabi_commands *commands = &config->commands;
645 struct sabi_data sretval;
646 int retval;
647 int i;
648
649 /* Read the state */
650 retval = sabi_command(samsung, commands->get_performance_level,
651 NULL, &sretval);
652 if (retval)
653 return retval;
654
655 /* The logic is backwards, yeah, lots of fun... */
656 for (i = 0; config->performance_levels[i].name; ++i) {
657 if (sretval.data[0] == config->performance_levels[i].value)
658 return sprintf(buf, "%s\n", config->performance_levels[i].name);
659 }
660 return sprintf(buf, "%s\n", "unknown");
661 }
662
663 static ssize_t set_performance_level(struct device *dev,
664 struct device_attribute *attr, const char *buf,
665 size_t count)
666 {
667 struct samsung_laptop *samsung = dev_get_drvdata(dev);
668 const struct sabi_config *config = samsung->config;
669 const struct sabi_commands *commands = &config->commands;
670 int i;
671
672 if (count < 1)
673 return count;
674
675 for (i = 0; config->performance_levels[i].name; ++i) {
676 const struct sabi_performance_level *level =
677 &config->performance_levels[i];
678 if (!strncasecmp(level->name, buf, strlen(level->name))) {
679 sabi_set_commandb(samsung,
680 commands->set_performance_level,
681 level->value);
682 break;
683 }
684 }
685
686 if (!config->performance_levels[i].name)
687 return -EINVAL;
688
689 return count;
690 }
691
692 static DEVICE_ATTR(performance_level, S_IWUSR | S_IRUGO,
693 get_performance_level, set_performance_level);
694
695 static int read_battery_life_extender(struct samsung_laptop *samsung)
696 {
697 const struct sabi_commands *commands = &samsung->config->commands;
698 struct sabi_data data;
699 int retval;
700
701 if (commands->get_battery_life_extender == 0xFFFF)
702 return -ENODEV;
703
704 memset(&data, 0, sizeof(data));
705 data.data[0] = 0x80;
706 retval = sabi_command(samsung, commands->get_battery_life_extender,
707 &data, &data);
708
709 if (retval)
710 return retval;
711
712 if (data.data[0] != 0 && data.data[0] != 1)
713 return -ENODEV;
714
715 return data.data[0];
716 }
717
718 static int write_battery_life_extender(struct samsung_laptop *samsung,
719 int enabled)
720 {
721 const struct sabi_commands *commands = &samsung->config->commands;
722 struct sabi_data data;
723
724 memset(&data, 0, sizeof(data));
725 data.data[0] = 0x80 | enabled;
726 return sabi_command(samsung, commands->set_battery_life_extender,
727 &data, NULL);
728 }
729
730 static ssize_t get_battery_life_extender(struct device *dev,
731 struct device_attribute *attr,
732 char *buf)
733 {
734 struct samsung_laptop *samsung = dev_get_drvdata(dev);
735 int ret;
736
737 ret = read_battery_life_extender(samsung);
738 if (ret < 0)
739 return ret;
740
741 return sprintf(buf, "%d\n", ret);
742 }
743
744 static ssize_t set_battery_life_extender(struct device *dev,
745 struct device_attribute *attr,
746 const char *buf, size_t count)
747 {
748 struct samsung_laptop *samsung = dev_get_drvdata(dev);
749 int ret, value;
750
751 if (!count || sscanf(buf, "%i", &value) != 1)
752 return -EINVAL;
753
754 ret = write_battery_life_extender(samsung, !!value);
755 if (ret < 0)
756 return ret;
757
758 return count;
759 }
760
761 static DEVICE_ATTR(battery_life_extender, S_IWUSR | S_IRUGO,
762 get_battery_life_extender, set_battery_life_extender);
763
764 static int read_usb_charge(struct samsung_laptop *samsung)
765 {
766 const struct sabi_commands *commands = &samsung->config->commands;
767 struct sabi_data data;
768 int retval;
769
770 if (commands->get_usb_charge == 0xFFFF)
771 return -ENODEV;
772
773 memset(&data, 0, sizeof(data));
774 data.data[0] = 0x80;
775 retval = sabi_command(samsung, commands->get_usb_charge,
776 &data, &data);
777
778 if (retval)
779 return retval;
780
781 if (data.data[0] != 0 && data.data[0] != 1)
782 return -ENODEV;
783
784 return data.data[0];
785 }
786
787 static int write_usb_charge(struct samsung_laptop *samsung,
788 int enabled)
789 {
790 const struct sabi_commands *commands = &samsung->config->commands;
791 struct sabi_data data;
792
793 memset(&data, 0, sizeof(data));
794 data.data[0] = 0x80 | enabled;
795 return sabi_command(samsung, commands->set_usb_charge,
796 &data, NULL);
797 }
798
799 static ssize_t get_usb_charge(struct device *dev,
800 struct device_attribute *attr,
801 char *buf)
802 {
803 struct samsung_laptop *samsung = dev_get_drvdata(dev);
804 int ret;
805
806 ret = read_usb_charge(samsung);
807 if (ret < 0)
808 return ret;
809
810 return sprintf(buf, "%d\n", ret);
811 }
812
813 static ssize_t set_usb_charge(struct device *dev,
814 struct device_attribute *attr,
815 const char *buf, size_t count)
816 {
817 struct samsung_laptop *samsung = dev_get_drvdata(dev);
818 int ret, value;
819
820 if (!count || sscanf(buf, "%i", &value) != 1)
821 return -EINVAL;
822
823 ret = write_usb_charge(samsung, !!value);
824 if (ret < 0)
825 return ret;
826
827 return count;
828 }
829
830 static DEVICE_ATTR(usb_charge, S_IWUSR | S_IRUGO,
831 get_usb_charge, set_usb_charge);
832
833 static struct attribute *platform_attributes[] = {
834 &dev_attr_performance_level.attr,
835 &dev_attr_battery_life_extender.attr,
836 &dev_attr_usb_charge.attr,
837 NULL
838 };
839
840 static int find_signature(void __iomem *memcheck, const char *testStr)
841 {
842 int i = 0;
843 int loca;
844
845 for (loca = 0; loca < 0xffff; loca++) {
846 char temp = readb(memcheck + loca);
847
848 if (temp == testStr[i]) {
849 if (i == strlen(testStr)-1)
850 break;
851 ++i;
852 } else {
853 i = 0;
854 }
855 }
856 return loca;
857 }
858
859 static void samsung_rfkill_exit(struct samsung_laptop *samsung)
860 {
861 if (samsung->wlan.rfkill) {
862 rfkill_unregister(samsung->wlan.rfkill);
863 rfkill_destroy(samsung->wlan.rfkill);
864 samsung->wlan.rfkill = NULL;
865 }
866 if (samsung->bluetooth.rfkill) {
867 rfkill_unregister(samsung->bluetooth.rfkill);
868 rfkill_destroy(samsung->bluetooth.rfkill);
869 samsung->bluetooth.rfkill = NULL;
870 }
871 }
872
873 static int samsung_new_rfkill(struct samsung_laptop *samsung,
874 struct samsung_rfkill *arfkill,
875 const char *name, enum rfkill_type type,
876 const struct rfkill_ops *ops,
877 int blocked)
878 {
879 struct rfkill **rfkill = &arfkill->rfkill;
880 int ret;
881
882 arfkill->type = type;
883 arfkill->samsung = samsung;
884
885 *rfkill = rfkill_alloc(name, &samsung->platform_device->dev,
886 type, ops, arfkill);
887
888 if (!*rfkill)
889 return -EINVAL;
890
891 if (blocked != -1)
892 rfkill_init_sw_state(*rfkill, blocked);
893
894 ret = rfkill_register(*rfkill);
895 if (ret) {
896 rfkill_destroy(*rfkill);
897 *rfkill = NULL;
898 return ret;
899 }
900 return 0;
901 }
902
903 static int __init samsung_rfkill_init_seclinux(struct samsung_laptop *samsung)
904 {
905 return samsung_new_rfkill(samsung, &samsung->wlan, "samsung-wlan",
906 RFKILL_TYPE_WLAN, &seclinux_rfkill_ops, -1);
907 }
908
909 static int __init samsung_rfkill_init_swsmi(struct samsung_laptop *samsung)
910 {
911 struct sabi_data data;
912 int ret;
913
914 ret = swsmi_wireless_status(samsung, &data);
915 if (ret) {
916 /* Some swsmi laptops use the old seclinux way to control
917 * wireless devices */
918 if (ret == -EINVAL)
919 ret = samsung_rfkill_init_seclinux(samsung);
920 return ret;
921 }
922
923 /* 0x02 seems to mean that the device is no present/available */
924
925 if (data.data[WL_STATUS_WLAN] != 0x02)
926 ret = samsung_new_rfkill(samsung, &samsung->wlan,
927 "samsung-wlan",
928 RFKILL_TYPE_WLAN,
929 &swsmi_rfkill_ops,
930 !data.data[WL_STATUS_WLAN]);
931 if (ret)
932 goto exit;
933
934 if (data.data[WL_STATUS_BT] != 0x02)
935 ret = samsung_new_rfkill(samsung, &samsung->bluetooth,
936 "samsung-bluetooth",
937 RFKILL_TYPE_BLUETOOTH,
938 &swsmi_rfkill_ops,
939 !data.data[WL_STATUS_BT]);
940 if (ret)
941 goto exit;
942
943 exit:
944 if (ret)
945 samsung_rfkill_exit(samsung);
946
947 return ret;
948 }
949
950 static int __init samsung_rfkill_init(struct samsung_laptop *samsung)
951 {
952 if (samsung->config->sabi_version == 2)
953 return samsung_rfkill_init_seclinux(samsung);
954 if (samsung->config->sabi_version == 3)
955 return samsung_rfkill_init_swsmi(samsung);
956 return 0;
957 }
958
959 static int kbd_backlight_enable(struct samsung_laptop *samsung)
960 {
961 const struct sabi_commands *commands = &samsung->config->commands;
962 struct sabi_data data;
963 int retval;
964
965 if (commands->kbd_backlight == 0xFFFF)
966 return -ENODEV;
967
968 memset(&data, 0, sizeof(data));
969 data.d0 = 0xaabb;
970 retval = sabi_command(samsung, commands->kbd_backlight,
971 &data, &data);
972
973 if (retval)
974 return retval;
975
976 if (data.d0 != 0xccdd)
977 return -ENODEV;
978 return 0;
979 }
980
981 static int kbd_backlight_read(struct samsung_laptop *samsung)
982 {
983 const struct sabi_commands *commands = &samsung->config->commands;
984 struct sabi_data data;
985 int retval;
986
987 memset(&data, 0, sizeof(data));
988 data.data[0] = 0x81;
989 retval = sabi_command(samsung, commands->kbd_backlight,
990 &data, &data);
991
992 if (retval)
993 return retval;
994
995 return data.data[0];
996 }
997
998 static int kbd_backlight_write(struct samsung_laptop *samsung, int brightness)
999 {
1000 const struct sabi_commands *commands = &samsung->config->commands;
1001 struct sabi_data data;
1002
1003 memset(&data, 0, sizeof(data));
1004 data.d0 = 0x82 | ((brightness & 0xFF) << 8);
1005 return sabi_command(samsung, commands->kbd_backlight,
1006 &data, NULL);
1007 }
1008
1009 static void kbd_led_update(struct work_struct *work)
1010 {
1011 struct samsung_laptop *samsung;
1012
1013 samsung = container_of(work, struct samsung_laptop, kbd_led_work);
1014 kbd_backlight_write(samsung, samsung->kbd_led_wk);
1015 }
1016
1017 static void kbd_led_set(struct led_classdev *led_cdev,
1018 enum led_brightness value)
1019 {
1020 struct samsung_laptop *samsung;
1021
1022 samsung = container_of(led_cdev, struct samsung_laptop, kbd_led);
1023
1024 if (value > samsung->kbd_led.max_brightness)
1025 value = samsung->kbd_led.max_brightness;
1026 else if (value < 0)
1027 value = 0;
1028
1029 samsung->kbd_led_wk = value;
1030 queue_work(samsung->led_workqueue, &samsung->kbd_led_work);
1031 }
1032
1033 static enum led_brightness kbd_led_get(struct led_classdev *led_cdev)
1034 {
1035 struct samsung_laptop *samsung;
1036
1037 samsung = container_of(led_cdev, struct samsung_laptop, kbd_led);
1038 return kbd_backlight_read(samsung);
1039 }
1040
1041 static void samsung_leds_exit(struct samsung_laptop *samsung)
1042 {
1043 if (!IS_ERR_OR_NULL(samsung->kbd_led.dev))
1044 led_classdev_unregister(&samsung->kbd_led);
1045 if (samsung->led_workqueue)
1046 destroy_workqueue(samsung->led_workqueue);
1047 }
1048
1049 static int __init samsung_leds_init(struct samsung_laptop *samsung)
1050 {
1051 int ret = 0;
1052
1053 samsung->led_workqueue = create_singlethread_workqueue("led_workqueue");
1054 if (!samsung->led_workqueue)
1055 return -ENOMEM;
1056
1057 if (kbd_backlight_enable(samsung) >= 0) {
1058 INIT_WORK(&samsung->kbd_led_work, kbd_led_update);
1059
1060 samsung->kbd_led.name = "samsung::kbd_backlight";
1061 samsung->kbd_led.brightness_set = kbd_led_set;
1062 samsung->kbd_led.brightness_get = kbd_led_get;
1063 samsung->kbd_led.max_brightness = 8;
1064 if (samsung->quirks->four_kbd_backlight_levels)
1065 samsung->kbd_led.max_brightness = 4;
1066
1067 ret = led_classdev_register(&samsung->platform_device->dev,
1068 &samsung->kbd_led);
1069 }
1070
1071 if (ret)
1072 samsung_leds_exit(samsung);
1073
1074 return ret;
1075 }
1076
1077 static void samsung_backlight_exit(struct samsung_laptop *samsung)
1078 {
1079 if (samsung->backlight_device) {
1080 backlight_device_unregister(samsung->backlight_device);
1081 samsung->backlight_device = NULL;
1082 }
1083 }
1084
1085 static int __init samsung_backlight_init(struct samsung_laptop *samsung)
1086 {
1087 struct backlight_device *bd;
1088 struct backlight_properties props;
1089
1090 if (!samsung->handle_backlight)
1091 return 0;
1092
1093 memset(&props, 0, sizeof(struct backlight_properties));
1094 props.type = BACKLIGHT_PLATFORM;
1095 props.max_brightness = samsung->config->max_brightness -
1096 samsung->config->min_brightness;
1097
1098 bd = backlight_device_register("samsung",
1099 &samsung->platform_device->dev,
1100 samsung, &backlight_ops,
1101 &props);
1102 if (IS_ERR(bd))
1103 return PTR_ERR(bd);
1104
1105 samsung->backlight_device = bd;
1106 samsung->backlight_device->props.brightness = read_brightness(samsung);
1107 samsung->backlight_device->props.power = FB_BLANK_UNBLANK;
1108 backlight_update_status(samsung->backlight_device);
1109
1110 return 0;
1111 }
1112
1113 static umode_t samsung_sysfs_is_visible(struct kobject *kobj,
1114 struct attribute *attr, int idx)
1115 {
1116 struct device *dev = container_of(kobj, struct device, kobj);
1117 struct platform_device *pdev = to_platform_device(dev);
1118 struct samsung_laptop *samsung = platform_get_drvdata(pdev);
1119 bool ok = true;
1120
1121 if (attr == &dev_attr_performance_level.attr)
1122 ok = !!samsung->config->performance_levels[0].name;
1123 if (attr == &dev_attr_battery_life_extender.attr)
1124 ok = !!(read_battery_life_extender(samsung) >= 0);
1125 if (attr == &dev_attr_usb_charge.attr)
1126 ok = !!(read_usb_charge(samsung) >= 0);
1127
1128 return ok ? attr->mode : 0;
1129 }
1130
1131 static struct attribute_group platform_attribute_group = {
1132 .is_visible = samsung_sysfs_is_visible,
1133 .attrs = platform_attributes
1134 };
1135
1136 static void samsung_sysfs_exit(struct samsung_laptop *samsung)
1137 {
1138 struct platform_device *device = samsung->platform_device;
1139
1140 sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
1141 }
1142
1143 static int __init samsung_sysfs_init(struct samsung_laptop *samsung)
1144 {
1145 struct platform_device *device = samsung->platform_device;
1146
1147 return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
1148
1149 }
1150
1151 static int show_call(struct seq_file *m, void *data)
1152 {
1153 struct samsung_laptop *samsung = m->private;
1154 struct sabi_data *sdata = &samsung->debug.data;
1155 int ret;
1156
1157 seq_printf(m, "SABI 0x%04x {0x%08x, 0x%08x, 0x%04x, 0x%02x}\n",
1158 samsung->debug.command,
1159 sdata->d0, sdata->d1, sdata->d2, sdata->d3);
1160
1161 ret = sabi_command(samsung, samsung->debug.command, sdata, sdata);
1162
1163 if (ret) {
1164 seq_printf(m, "SABI command 0x%04x failed\n",
1165 samsung->debug.command);
1166 return ret;
1167 }
1168
1169 seq_printf(m, "SABI {0x%08x, 0x%08x, 0x%04x, 0x%02x}\n",
1170 sdata->d0, sdata->d1, sdata->d2, sdata->d3);
1171 return 0;
1172 }
1173
1174 static int samsung_debugfs_open(struct inode *inode, struct file *file)
1175 {
1176 return single_open(file, show_call, inode->i_private);
1177 }
1178
1179 static const struct file_operations samsung_laptop_call_io_ops = {
1180 .owner = THIS_MODULE,
1181 .open = samsung_debugfs_open,
1182 .read = seq_read,
1183 .llseek = seq_lseek,
1184 .release = single_release,
1185 };
1186
1187 static void samsung_debugfs_exit(struct samsung_laptop *samsung)
1188 {
1189 debugfs_remove_recursive(samsung->debug.root);
1190 }
1191
1192 static int samsung_debugfs_init(struct samsung_laptop *samsung)
1193 {
1194 struct dentry *dent;
1195
1196 samsung->debug.root = debugfs_create_dir("samsung-laptop", NULL);
1197 if (!samsung->debug.root) {
1198 pr_err("failed to create debugfs directory");
1199 goto error_debugfs;
1200 }
1201
1202 samsung->debug.f0000_wrapper.data = samsung->f0000_segment;
1203 samsung->debug.f0000_wrapper.size = 0xffff;
1204
1205 samsung->debug.data_wrapper.data = &samsung->debug.data;
1206 samsung->debug.data_wrapper.size = sizeof(samsung->debug.data);
1207
1208 samsung->debug.sdiag_wrapper.data = samsung->sdiag;
1209 samsung->debug.sdiag_wrapper.size = strlen(samsung->sdiag);
1210
1211 dent = debugfs_create_u16("command", S_IRUGO | S_IWUSR,
1212 samsung->debug.root, &samsung->debug.command);
1213 if (!dent)
1214 goto error_debugfs;
1215
1216 dent = debugfs_create_u32("d0", S_IRUGO | S_IWUSR, samsung->debug.root,
1217 &samsung->debug.data.d0);
1218 if (!dent)
1219 goto error_debugfs;
1220
1221 dent = debugfs_create_u32("d1", S_IRUGO | S_IWUSR, samsung->debug.root,
1222 &samsung->debug.data.d1);
1223 if (!dent)
1224 goto error_debugfs;
1225
1226 dent = debugfs_create_u16("d2", S_IRUGO | S_IWUSR, samsung->debug.root,
1227 &samsung->debug.data.d2);
1228 if (!dent)
1229 goto error_debugfs;
1230
1231 dent = debugfs_create_u8("d3", S_IRUGO | S_IWUSR, samsung->debug.root,
1232 &samsung->debug.data.d3);
1233 if (!dent)
1234 goto error_debugfs;
1235
1236 dent = debugfs_create_blob("data", S_IRUGO | S_IWUSR,
1237 samsung->debug.root,
1238 &samsung->debug.data_wrapper);
1239 if (!dent)
1240 goto error_debugfs;
1241
1242 dent = debugfs_create_blob("f0000_segment", S_IRUSR | S_IWUSR,
1243 samsung->debug.root,
1244 &samsung->debug.f0000_wrapper);
1245 if (!dent)
1246 goto error_debugfs;
1247
1248 dent = debugfs_create_file("call", S_IFREG | S_IRUGO,
1249 samsung->debug.root, samsung,
1250 &samsung_laptop_call_io_ops);
1251 if (!dent)
1252 goto error_debugfs;
1253
1254 dent = debugfs_create_blob("sdiag", S_IRUGO | S_IWUSR,
1255 samsung->debug.root,
1256 &samsung->debug.sdiag_wrapper);
1257 if (!dent)
1258 goto error_debugfs;
1259
1260 return 0;
1261
1262 error_debugfs:
1263 samsung_debugfs_exit(samsung);
1264 return -ENOMEM;
1265 }
1266
1267 static void samsung_sabi_exit(struct samsung_laptop *samsung)
1268 {
1269 const struct sabi_config *config = samsung->config;
1270
1271 /* Turn off "Linux" mode in the BIOS */
1272 if (config && config->commands.set_linux != 0xff)
1273 sabi_set_commandb(samsung, config->commands.set_linux, 0x80);
1274
1275 if (samsung->sabi_iface) {
1276 iounmap(samsung->sabi_iface);
1277 samsung->sabi_iface = NULL;
1278 }
1279 if (samsung->f0000_segment) {
1280 iounmap(samsung->f0000_segment);
1281 samsung->f0000_segment = NULL;
1282 }
1283
1284 samsung->config = NULL;
1285 }
1286
1287 static __init void samsung_sabi_infos(struct samsung_laptop *samsung, int loca,
1288 unsigned int ifaceP)
1289 {
1290 const struct sabi_config *config = samsung->config;
1291
1292 printk(KERN_DEBUG "This computer supports SABI==%x\n",
1293 loca + 0xf0000 - 6);
1294
1295 printk(KERN_DEBUG "SABI header:\n");
1296 printk(KERN_DEBUG " SMI Port Number = 0x%04x\n",
1297 readw(samsung->sabi + config->header_offsets.port));
1298 printk(KERN_DEBUG " SMI Interface Function = 0x%02x\n",
1299 readb(samsung->sabi + config->header_offsets.iface_func));
1300 printk(KERN_DEBUG " SMI enable memory buffer = 0x%02x\n",
1301 readb(samsung->sabi + config->header_offsets.en_mem));
1302 printk(KERN_DEBUG " SMI restore memory buffer = 0x%02x\n",
1303 readb(samsung->sabi + config->header_offsets.re_mem));
1304 printk(KERN_DEBUG " SABI data offset = 0x%04x\n",
1305 readw(samsung->sabi + config->header_offsets.data_offset));
1306 printk(KERN_DEBUG " SABI data segment = 0x%04x\n",
1307 readw(samsung->sabi + config->header_offsets.data_segment));
1308
1309 printk(KERN_DEBUG " SABI pointer = 0x%08x\n", ifaceP);
1310 }
1311
1312 static void __init samsung_sabi_diag(struct samsung_laptop *samsung)
1313 {
1314 int loca = find_signature(samsung->f0000_segment, "SDiaG@");
1315 int i;
1316
1317 if (loca == 0xffff)
1318 return ;
1319
1320 /* Example:
1321 * Ident: @SDiaG@686XX-N90X3A/966-SEC-07HL-S90X3A
1322 *
1323 * Product name: 90X3A
1324 * BIOS Version: 07HL
1325 */
1326 loca += 1;
1327 for (i = 0; loca < 0xffff && i < sizeof(samsung->sdiag) - 1; loca++) {
1328 char temp = readb(samsung->f0000_segment + loca);
1329
1330 if (isalnum(temp) || temp == '/' || temp == '-')
1331 samsung->sdiag[i++] = temp;
1332 else
1333 break ;
1334 }
1335
1336 if (debug && samsung->sdiag[0])
1337 pr_info("sdiag: %s", samsung->sdiag);
1338 }
1339
1340 static int __init samsung_sabi_init(struct samsung_laptop *samsung)
1341 {
1342 const struct sabi_config *config = NULL;
1343 const struct sabi_commands *commands;
1344 unsigned int ifaceP;
1345 int ret = 0;
1346 int i;
1347 int loca;
1348
1349 samsung->f0000_segment = ioremap_nocache(0xf0000, 0xffff);
1350 if (!samsung->f0000_segment) {
1351 if (debug || force)
1352 pr_err("Can't map the segment at 0xf0000\n");
1353 ret = -EINVAL;
1354 goto exit;
1355 }
1356
1357 samsung_sabi_diag(samsung);
1358
1359 /* Try to find one of the signatures in memory to find the header */
1360 for (i = 0; sabi_configs[i].test_string != 0; ++i) {
1361 samsung->config = &sabi_configs[i];
1362 loca = find_signature(samsung->f0000_segment,
1363 samsung->config->test_string);
1364 if (loca != 0xffff)
1365 break;
1366 }
1367
1368 if (loca == 0xffff) {
1369 if (debug || force)
1370 pr_err("This computer does not support SABI\n");
1371 ret = -ENODEV;
1372 goto exit;
1373 }
1374
1375 config = samsung->config;
1376 commands = &config->commands;
1377
1378 /* point to the SMI port Number */
1379 loca += 1;
1380 samsung->sabi = (samsung->f0000_segment + loca);
1381
1382 /* Get a pointer to the SABI Interface */
1383 ifaceP = (readw(samsung->sabi + config->header_offsets.data_segment) & 0x0ffff) << 4;
1384 ifaceP += readw(samsung->sabi + config->header_offsets.data_offset) & 0x0ffff;
1385
1386 if (debug)
1387 samsung_sabi_infos(samsung, loca, ifaceP);
1388
1389 samsung->sabi_iface = ioremap_nocache(ifaceP, 16);
1390 if (!samsung->sabi_iface) {
1391 pr_err("Can't remap %x\n", ifaceP);
1392 ret = -EINVAL;
1393 goto exit;
1394 }
1395
1396 /* Turn on "Linux" mode in the BIOS */
1397 if (commands->set_linux != 0xff) {
1398 int retval = sabi_set_commandb(samsung,
1399 commands->set_linux, 0x81);
1400 if (retval) {
1401 pr_warn("Linux mode was not set!\n");
1402 ret = -ENODEV;
1403 goto exit;
1404 }
1405 }
1406
1407 /* Check for stepping quirk */
1408 if (samsung->handle_backlight)
1409 check_for_stepping_quirk(samsung);
1410
1411 pr_info("detected SABI interface: %s\n",
1412 samsung->config->test_string);
1413
1414 exit:
1415 if (ret)
1416 samsung_sabi_exit(samsung);
1417
1418 return ret;
1419 }
1420
1421 static void samsung_platform_exit(struct samsung_laptop *samsung)
1422 {
1423 if (samsung->platform_device) {
1424 platform_device_unregister(samsung->platform_device);
1425 samsung->platform_device = NULL;
1426 }
1427 }
1428
1429 static int samsung_pm_notification(struct notifier_block *nb,
1430 unsigned long val, void *ptr)
1431 {
1432 struct samsung_laptop *samsung;
1433
1434 samsung = container_of(nb, struct samsung_laptop, pm_nb);
1435 if (val == PM_POST_HIBERNATION &&
1436 samsung->quirks->enable_kbd_backlight)
1437 kbd_backlight_enable(samsung);
1438
1439 return 0;
1440 }
1441
1442 static int __init samsung_platform_init(struct samsung_laptop *samsung)
1443 {
1444 struct platform_device *pdev;
1445
1446 pdev = platform_device_register_simple("samsung", -1, NULL, 0);
1447 if (IS_ERR(pdev))
1448 return PTR_ERR(pdev);
1449
1450 samsung->platform_device = pdev;
1451 platform_set_drvdata(samsung->platform_device, samsung);
1452 return 0;
1453 }
1454
1455 static struct samsung_quirks *quirks;
1456
1457 static int __init samsung_dmi_matched(const struct dmi_system_id *d)
1458 {
1459 quirks = d->driver_data;
1460 return 0;
1461 }
1462
1463 static struct dmi_system_id __initdata samsung_dmi_table[] = {
1464 {
1465 .matches = {
1466 DMI_MATCH(DMI_SYS_VENDOR,
1467 "SAMSUNG ELECTRONICS CO., LTD."),
1468 DMI_MATCH(DMI_CHASSIS_TYPE, "8"), /* Portable */
1469 },
1470 },
1471 {
1472 .matches = {
1473 DMI_MATCH(DMI_SYS_VENDOR,
1474 "SAMSUNG ELECTRONICS CO., LTD."),
1475 DMI_MATCH(DMI_CHASSIS_TYPE, "9"), /* Laptop */
1476 },
1477 },
1478 {
1479 .matches = {
1480 DMI_MATCH(DMI_SYS_VENDOR,
1481 "SAMSUNG ELECTRONICS CO., LTD."),
1482 DMI_MATCH(DMI_CHASSIS_TYPE, "10"), /* Notebook */
1483 },
1484 },
1485 {
1486 .matches = {
1487 DMI_MATCH(DMI_SYS_VENDOR,
1488 "SAMSUNG ELECTRONICS CO., LTD."),
1489 DMI_MATCH(DMI_CHASSIS_TYPE, "14"), /* Sub-Notebook */
1490 },
1491 },
1492 /* DMI ids for laptops with bad Chassis Type */
1493 {
1494 .ident = "R40/R41",
1495 .matches = {
1496 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1497 DMI_MATCH(DMI_PRODUCT_NAME, "R40/R41"),
1498 DMI_MATCH(DMI_BOARD_NAME, "R40/R41"),
1499 },
1500 },
1501 /* Specific DMI ids for laptop with quirks */
1502 {
1503 .callback = samsung_dmi_matched,
1504 .ident = "N150P",
1505 .matches = {
1506 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1507 DMI_MATCH(DMI_PRODUCT_NAME, "N150P"),
1508 DMI_MATCH(DMI_BOARD_NAME, "N150P"),
1509 },
1510 .driver_data = &samsung_broken_acpi_video,
1511 },
1512 {
1513 .callback = samsung_dmi_matched,
1514 .ident = "N145P/N250P/N260P",
1515 .matches = {
1516 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1517 DMI_MATCH(DMI_PRODUCT_NAME, "N145P/N250P/N260P"),
1518 DMI_MATCH(DMI_BOARD_NAME, "N145P/N250P/N260P"),
1519 },
1520 .driver_data = &samsung_broken_acpi_video,
1521 },
1522 {
1523 .callback = samsung_dmi_matched,
1524 .ident = "N150/N210/N220",
1525 .matches = {
1526 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1527 DMI_MATCH(DMI_PRODUCT_NAME, "N150/N210/N220"),
1528 DMI_MATCH(DMI_BOARD_NAME, "N150/N210/N220"),
1529 },
1530 .driver_data = &samsung_broken_acpi_video,
1531 },
1532 {
1533 .callback = samsung_dmi_matched,
1534 .ident = "NF110/NF210/NF310",
1535 .matches = {
1536 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1537 DMI_MATCH(DMI_PRODUCT_NAME, "NF110/NF210/NF310"),
1538 DMI_MATCH(DMI_BOARD_NAME, "NF110/NF210/NF310"),
1539 },
1540 .driver_data = &samsung_broken_acpi_video,
1541 },
1542 {
1543 .callback = samsung_dmi_matched,
1544 .ident = "X360",
1545 .matches = {
1546 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1547 DMI_MATCH(DMI_PRODUCT_NAME, "X360"),
1548 DMI_MATCH(DMI_BOARD_NAME, "X360"),
1549 },
1550 .driver_data = &samsung_broken_acpi_video,
1551 },
1552 {
1553 .callback = samsung_dmi_matched,
1554 .ident = "N250P",
1555 .matches = {
1556 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1557 DMI_MATCH(DMI_PRODUCT_NAME, "N250P"),
1558 DMI_MATCH(DMI_BOARD_NAME, "N250P"),
1559 },
1560 .driver_data = &samsung_broken_acpi_video,
1561 },
1562 {
1563 .callback = samsung_dmi_matched,
1564 .ident = "730U3E/740U3E",
1565 .matches = {
1566 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1567 DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"),
1568 },
1569 .driver_data = &samsung_np740u3e,
1570 },
1571 { },
1572 };
1573 MODULE_DEVICE_TABLE(dmi, samsung_dmi_table);
1574
1575 static struct platform_device *samsung_platform_device;
1576
1577 static int __init samsung_init(void)
1578 {
1579 struct samsung_laptop *samsung;
1580 int ret;
1581
1582 if (efi_enabled(EFI_BOOT))
1583 return -ENODEV;
1584
1585 quirks = &samsung_unknown;
1586 if (!force && !dmi_check_system(samsung_dmi_table))
1587 return -ENODEV;
1588
1589 samsung = kzalloc(sizeof(*samsung), GFP_KERNEL);
1590 if (!samsung)
1591 return -ENOMEM;
1592
1593 mutex_init(&samsung->sabi_mutex);
1594 samsung->handle_backlight = true;
1595 samsung->quirks = quirks;
1596
1597
1598 #ifdef CONFIG_ACPI
1599 if (samsung->quirks->broken_acpi_video)
1600 acpi_video_dmi_promote_vendor();
1601
1602 /* Don't handle backlight here if the acpi video already handle it */
1603 if (acpi_video_backlight_support()) {
1604 samsung->handle_backlight = false;
1605 } else if (samsung->quirks->broken_acpi_video) {
1606 pr_info("Disabling ACPI video driver\n");
1607 acpi_video_unregister();
1608 }
1609 #endif
1610
1611 ret = samsung_platform_init(samsung);
1612 if (ret)
1613 goto error_platform;
1614
1615 ret = samsung_sabi_init(samsung);
1616 if (ret)
1617 goto error_sabi;
1618
1619 #ifdef CONFIG_ACPI
1620 /* Only log that if we are really on a sabi platform */
1621 if (acpi_video_backlight_support())
1622 pr_info("Backlight controlled by ACPI video driver\n");
1623 #endif
1624
1625 ret = samsung_sysfs_init(samsung);
1626 if (ret)
1627 goto error_sysfs;
1628
1629 ret = samsung_backlight_init(samsung);
1630 if (ret)
1631 goto error_backlight;
1632
1633 ret = samsung_rfkill_init(samsung);
1634 if (ret)
1635 goto error_rfkill;
1636
1637 ret = samsung_leds_init(samsung);
1638 if (ret)
1639 goto error_leds;
1640
1641 ret = samsung_debugfs_init(samsung);
1642 if (ret)
1643 goto error_debugfs;
1644
1645 samsung->pm_nb.notifier_call = samsung_pm_notification;
1646 register_pm_notifier(&samsung->pm_nb);
1647
1648 samsung_platform_device = samsung->platform_device;
1649 return ret;
1650
1651 error_debugfs:
1652 samsung_leds_exit(samsung);
1653 error_leds:
1654 samsung_rfkill_exit(samsung);
1655 error_rfkill:
1656 samsung_backlight_exit(samsung);
1657 error_backlight:
1658 samsung_sysfs_exit(samsung);
1659 error_sysfs:
1660 samsung_sabi_exit(samsung);
1661 error_sabi:
1662 samsung_platform_exit(samsung);
1663 error_platform:
1664 kfree(samsung);
1665 return ret;
1666 }
1667
1668 static void __exit samsung_exit(void)
1669 {
1670 struct samsung_laptop *samsung;
1671
1672 samsung = platform_get_drvdata(samsung_platform_device);
1673 unregister_pm_notifier(&samsung->pm_nb);
1674
1675 samsung_debugfs_exit(samsung);
1676 samsung_leds_exit(samsung);
1677 samsung_rfkill_exit(samsung);
1678 samsung_backlight_exit(samsung);
1679 samsung_sysfs_exit(samsung);
1680 samsung_sabi_exit(samsung);
1681 samsung_platform_exit(samsung);
1682
1683 kfree(samsung);
1684 samsung_platform_device = NULL;
1685 }
1686
1687 module_init(samsung_init);
1688 module_exit(samsung_exit);
1689
1690 MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@suse.de>");
1691 MODULE_DESCRIPTION("Samsung Backlight driver");
1692 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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